This example demonstrates a single SVG circle, serving as a minimal introduction to SVG fundamentals. It uses the SVG `<svg>` and `<circle>` elements directly within an HTML document, with no external libraries. The circle is defined by its center coordinates (`cx`, `cy`) and radius (`r`), all set to 50, and is rendered by the browser's SVG engine. The code shows the basic structure for vector graphics but performs no interaction, animation, or data-driven drawing.